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Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
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Published on: December 1, 2023

Ergonomic analysis of microlaryngoscopy.

Melissa McCarty Statham1, Alison L Sukits, Mark S Redfern

  • 1University of Pittsburgh Voice Center, Department of Otolaryngology, Pittsburgh, Pennsylvania, USA.

The Laryngoscope
|December 2, 2009
PubMed
Summary

Ergonomic analysis of laryngeal microsurgery positions shows that using a chair with articulated arm supports significantly reduces surgeon risk for musculoskeletal injury. This optimized positioning decreases neck strain and L5/S1 disc compression.

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Area of Science:

  • Surgical Ergonomics
  • Occupational Health
  • Musculoskeletal Biomechanics

Background:

  • Laryngeal microsurgery demands prolonged, precise surgeon positioning.
  • High prevalence of musculoskeletal disorders among surgeons is linked to poor operative ergonomics.
  • Objective assessment of surgical postures is crucial for injury prevention.

Purpose of the Study:

  • To evaluate and compare the ergonomic risks of three distinct operative positions in laryngeal microsurgery.
  • To identify surgeon postures associated with reduced musculoskeletal strain.
  • To provide evidence-based recommendations for optimal surgical positioning.

Main Methods:

  • Prospective case-control study analyzing three microlaryngeal operative positions.
  • Utilized Rapid Upper Limb Assessment (RULA) for postural analysis and risk scoring.
  • Calculated joint forces (neck, shoulder) and L5/S1 disc compression forces.

Main Results:

  • Unsupported arms and poorly adjusted equipment resulted in higher-risk postures.
  • Mayo stand support increased neck flexion and strain compared to articulated arm supports.
  • Articulated arm supports significantly decreased neck strain, shoulder torque, and L5/S1 disc forces.

Conclusions:

  • Ergonomic principles and biomechanical analysis identify specific lower-risk positions for laryngeal microsurgery.
  • Adopting recommended postures can mitigate repetitive stress injuries and associated pain.
  • Improved surgeon ergonomics may enhance microsurgical precision and motor control.